2 ok I am doing this cause I can not answer with out 20 words so that should be good now
J = 12
Workings in the picture below :)
The slope-intercept form: y = mx + b
m - slope
b - y-intercept
We have y = 4x + 3
m = 4 - slope
3 - y-intercept

4 units up and 1 unit right
5x=x+4
5x-x=x-x+4
4x=4
4x/4=4/4
x=1
Hope this helps you. :)